


DuraChlor 4 Lb Water Hardness Increaser
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
DuraChlor 4 Lb Water Hardness IncreaserDuraChlor 4 Lb Water Hardness Increaser Raises calcium hardness to prevent long term damage to the pool and its equipment. Ideal range is 200 400 ppm Features & Benefits: Contains: Calcium carbonate Granular product Eliminates a cause of pool components failing prematurely
Quick Dispatch:
Your DuraChlor 4 Lb Water Hardness Increaser orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.5 ★★★★★
Based on 807 reviews
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Product Reviews
★★★★★ 5
Nice & cool
Color: Beige, Size: King (20" X 36")
These are the best pillowcases! I love having a cooling side for summer and a warm side for winter. I can't imagine switching back to normal cotton pillowcases after using these. They zip on so they stay on unlike regular pillowcases.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 11, 2026
★★★★★ 4
Nice pillowcases that stay cool
very soft and seem to stay cool!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
★★★★★ 5
It works!
Color: White, Size: Standard (20" X 26")
Wow, very chilly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 5
Amazing Cooling Pillowcases – So Comfortable!
Color: Gray, Size: Standard (20" X 26")
I absolutely love these LUXEAR pillowcase They feel cool and soft and they really help keep my pillow fresh and comfortable throughout the night. The fabric feels high quality and doesn’t trap heat The size is perfect, and getting two in one pack is a great value for the price I highly recommend them if you’re looking for a more comfortable sleep
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2026
★★★★★ 3
Not worth it
Color: Gray, Size: King (20" X 36")
These start out nice and cool but within minutes your body heat turns them warm. Not worth the money.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 23, 2025
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